package com.yhcrt.utils;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

import org.apache.commons.lang.StringUtils;
/**
 * 日期工具
 * @author kejunzhong
 * 2017年5月9日
 * 
 */
public class DateUtil {
	private final static SimpleDateFormat sdfYear = new SimpleDateFormat("yyyy");

	private final static SimpleDateFormat sdfDay = new SimpleDateFormat("yyyy-MM-dd");

	private final static SimpleDateFormat sdfDays = new SimpleDateFormat("yyyyMMdd");
	
	private final static SimpleDateFormat sdfTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
	
	private final static SimpleDateFormat sdfMMDD = new SimpleDateFormat("MM.dd");
	/**
	 * 获取YYYY格式
	 * @return
	 */
	public static String getYear() {
		return sdfYear.format(new Date());
	}

	/**
	 * 获取YYYY-MM-DD格式
	 * @return
	 */
	public static String getDay() {
		return sdfDay.format(new Date());
	}

	/**
	 * 获取YYYYMMDD格式
	 * @return
	 */
	public static String getDays() {
		return sdfDays.format(new Date());
	}

	/**
	 * 获取YYYY-MM-DD HH:mm:ss格式
	 * @return
	 */
	public static String getTime() {
		return sdfTime.format(new Date());
	}

	/**
	 * 转换为YYYY-MM-DD格式
	 * @return
	 */
	public static String DateToStr(Date date) {
		return sdfDay.format(date);
	}
	
	/**
	 * 转换为MM.DD格式
	 * @return
	 */
	public static String DateToMMDD(Date date) {
		return sdfMMDD.format(date);
	}
	
    /**
     * 日期转字符串(yyyyMMddHHmmss)
     */
    public static String getDateToString14() throws RuntimeException {
	    Date date = 	new Date();
		SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
		String dateStr = "";
		if (date != null) {
		    dateStr = sdf.format(date);
		}
		return dateStr;
    }
	/**
	 * @Title: compareDate
	 * @Description: TODO(日期比较，如果s>=e 返回true 否则返回false)
	 * @param s
	 * @param e
	 * @return boolean
	 * @throws
	 * @author luguosui
	 */
	public static boolean compareDate(String s, String e) {
		if (fomatDate(s) == null || fomatDate(e) == null) {
			return false;
		}
		return fomatDate(s).getTime() >= fomatDate(e).getTime();
	}

	/**
	 * 格式化日期
	 * @return
	 */
	public static Date fomatDate(String date) {
		try {
			return sdfDay.parse(date);
		} catch (ParseException e) {
			e.printStackTrace();
			return null;
		}
	}
	/**
	 * 格式化日期(yyyy/MM/dd-->yyyy-MM-dd)
	 * @return
	 */
	public static String stringToString(String str) {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");
		String dateStr = "";
		try {
		    if (StringUtils.isNotBlank(str)) {
		    	Date date = sdf.parse(str);
		    	dateStr = sdfDay.format(date);
		    }
		} catch (ParseException e) {
		    e.printStackTrace();
		}
		return dateStr;
	}

	/**
	 * 校验日期是否合法(yyyy-MM-dd)
	 * @return
	 */
	public static boolean isValidDate(String s) {
		DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
		try {
			fmt.parse(s);
			return true;
		} catch (Exception e) {
			// 如果throw java.text.ParseException或者NullPointerException，就说明格式不对
			return false;
		}
	}
	/**
	 * 校验日期是否合法(yyyy-MM-dd)
	 * @return
	 */
	public static boolean isValidDate1(String s) {
		DateFormat fmt = new SimpleDateFormat("yyyy/MM/dd");
		try {
			fmt.parse(s);
			return true;
		} catch (Exception e) {
			// 如果throw java.text.ParseException或者NullPointerException，就说明格式不对
			return false;
		}
	}

	public static int getDiffYear(String startTime, String endTime) {
		DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
		try {
			long aa = 0;
			int years = (int) (((fmt.parse(endTime).getTime() - fmt.parse(startTime).getTime()) / (1000 * 60 * 60 * 24)) / 365);
			return years;
		} catch (Exception e) {
			// 如果throw java.text.ParseException或者NullPointerException，就说明格式不对
			return 0;
		}
	}

	/**
	 * <li>功能描述：时间相减得到天数
	 * @param beginDateStr
	 * @param endDateStr
	 * @return long
	 * @author Administrator
	 */
	public static long getDaySub(String beginDateStr, String endDateStr) {
		long day = 0;
		java.text.SimpleDateFormat format = new java.text.SimpleDateFormat("yyyy-MM-dd");
		java.util.Date beginDate = null;
		java.util.Date endDate = null;

		try {
			beginDate = format.parse(beginDateStr);
			endDate = format.parse(endDateStr);
		} catch (ParseException e) {
			e.printStackTrace();
		}
		day = (endDate.getTime() - beginDate.getTime()) / (24 * 60 * 60 * 1000);
		// System.out.println("相隔的天数="+day);

		return day;
	}

	/**
	 * 得到n天之后的日期
	 * @param days
	 * @return
	 */
	public static String getAfterDayDate(String days) {
		int daysInt = Integer.parseInt(days);

		Calendar canlendar = Calendar.getInstance(); // java.util包
		canlendar.add(Calendar.DATE, daysInt); // 日期减 如果不够减会将月变动
		Date date = canlendar.getTime();

		SimpleDateFormat sdfd = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		String dateStr = sdfd.format(date);

		return dateStr;
	}

	/**
	 * 得到n天之后是周几
	 * @param days
	 * @return
	 */
	public static String getAfterDayWeek(String days) {
		int daysInt = Integer.parseInt(days);

		Calendar canlendar = Calendar.getInstance(); // java.util包
		canlendar.add(Calendar.DATE, daysInt); // 日期减 如果不够减会将月变动
		Date date = canlendar.getTime();

		SimpleDateFormat sdf = new SimpleDateFormat("E");
		String dateStr = sdf.format(date);

		return dateStr;
	}
	/**
	 * 
	 * @Title: getAge
	 * @Description: 有年月日获取年龄
	 * @return: int
	 */
    public static  int getAge(String birthStr){  
    	
    	Date birthDay = fomatDate(birthStr);  
    	 
        Calendar cal = Calendar.getInstance();  
        if (cal.before(birthDay)) {  
           System.out.println("参数为空");
           return 0;
        }  
        int yearNow = cal.get(Calendar.YEAR);  
        int monthNow = cal.get(Calendar.MONTH);  
        int dayOfMonthNow = cal.get(Calendar.DAY_OF_MONTH);  
        cal.setTime(birthDay);  
  
        int yearBirth = cal.get(Calendar.YEAR);  
        int monthBirth = cal.get(Calendar.MONTH);  
        int dayOfMonthBirth = cal.get(Calendar.DAY_OF_MONTH);  
  
        int age = yearNow - yearBirth;  
  
        if (monthNow <= monthBirth) {  
            if (monthNow == monthBirth) {  
                if (dayOfMonthNow < dayOfMonthBirth) age--;  
            }else{  
                age--;  
            }  
        }  
        return age;  
    }  
    /**
     * 得到两个日期之间的所有日期
     * @param beginStr
     * @param endStr
     * @return
     */
    public static List<String> getBetweenDates(String beginStr, String endStr) {
    	Date beginDate = DateUtil.fomatDate(beginStr);
    	Date endDate = DateUtil.fomatDate(endStr);
        List<String> result = new ArrayList<String>();
        Calendar tempStart = Calendar.getInstance();
        tempStart.setTime(beginDate);
	     while(beginDate.getTime()<=endDate.getTime()){
	         result.add( DateUtil.DateToStr(tempStart.getTime()));
	         tempStart.add(Calendar.DAY_OF_YEAR, 1);
	         beginDate = tempStart.getTime();
	     }
        return result;
    }
    
    private static List<Integer> getMonthBetween(String minDate, String maxDate) throws ParseException {
        ArrayList<Integer> result = new ArrayList<Integer>();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");//格式化为年月

        Calendar min = Calendar.getInstance();
        Calendar max = Calendar.getInstance();

        min.setTime(sdf.parse(minDate));
        min.set(min.get(Calendar.YEAR), min.get(Calendar.MONTH), 1);

        max.setTime(sdf.parse(maxDate));
        max.set(max.get(Calendar.YEAR), max.get(Calendar.MONTH), 2);

        Calendar curr = min;
        while (curr.before(max)) { 
         curr.add(Calendar.MONTH, 1);
         result.add(curr.get(Calendar.MONTH));
        }

        return result;
      }
    
	public static void main(String[] args){
		
		try {
			System.out.println(getMonthBetween("2017-05-03","2018-05-15"));
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

}
